Miami, United States - Last Thursday, Pamela Rauseo was driving along Miami's Dolphin Expressway when she noticed that her five-month-old nephew was unwell.
Little Sebastian, who suffers from respiratory problems after being born prematurely, had already started to turn blue.
His aunt leapt out of her car and cried for help.
"My sister had trusted me with him," Ms. Rauseo, 37, said. "I don't know how I remembered what to do. I just knew I couldn't let him die".
She started giving the baby the CPR procedure (cardiopulmonary resuscitation) as several people stopped to help.
A policeman soon took over the CPR. He and other witnesses got the baby breathing again before emergency workers arrived.
The baby survived and received medical treatment.